Global Patent Index - EP 1337679 A4

EP 1337679 A4 20040609 - GRAIN-REFINED AUSTENITIC MANGANESE STEEL CASTING HAVING MICROADDITIONS OF VANADIUM AND TITANIUM AND METHOD OF MANUFACTURING

Title (en)

GRAIN-REFINED AUSTENITIC MANGANESE STEEL CASTING HAVING MICROADDITIONS OF VANADIUM AND TITANIUM AND METHOD OF MANUFACTURING

Title (de)

ABGUSS AUS KORNVERFEINERTEM AUSTENITISCHEM MANGANSTAHL MIT VANADIUM- UND TITAN-MIKROZUSÄTZEN UND HERSTELLUNGSVERFAHREN

Title (fr)

MOULAGE D'ACIER AU MANGANESE AUSTENITIQUE A GRAIN RAFFINE PRESENTANT DES MICROADDITIFS DE VANADIUM ET DE TITANE ET PROCEDE DE FABRICATION

Publication

EP 1337679 A4 20040609 (EN)

Application

EP 01979440 A 20011003

Priority

  • US 0131018 W 20011003
  • US 24181900 P 20001019

Abstract (en)

[origin: US2002048529A1] An austenitic manganese steel microalloyed with nitrogen, vanadium and titanium used for castings such as mantles, bowls and jaws manufactured as wear components of crushers in the mining and aggregate industries, hammers used in scrap shredders, frogs and switches used in railway crossings and buckets and track shoes used in mining power shovels. These novel compositions exhibit a fine grain size having carbonitride precipitates that result in castings having a wear life 20-70% longer than prior art castings. The austenitic manganese steel includes, in weight percentages, the following: about 11.0% to 24.0% manganese, about 1.0% to 1.4% carbon, up to about 1% silicon, up to about 1.9% chromium, up to about 0.25% nickel, up to about 1.0% molybdenum, up to about 0.2% aluminum, up to about 0.25% copper, phosphorus and sulfur present as impurities in amounts of about 0.07% max and about 0.06% max. respectively, microalloying additions of titanium in the amounts of about 0.020-0.070%, optionally, microalloying additions of niobium in amounts from about 0.020-0.070%, microalloying additions of vanadium in amounts from about 0.020-0.070%, nitrogen in amounts from about 100 to 1000 ppm, and such that the total amount of the microalloying additions of titanium+niobium+vanadium+nitrogen is no less than about 0.05% and no greater than about 0.22%, the ratio of carbon to microalloying additions being in the range of about 10:1-25:1, and the balance of the alloy being essentially iron, the alloy being characterized by a substantial absence of zirconium and the presence of titanium carbonitride precipitates.

IPC 1-7

C22C 38/00; C22C 38/04; C22C 38/44; C22C 38/46; C22C 38/50

IPC 8 full level

B22D 1/00 (2006.01); B22D 2/00 (2006.01); C21C 5/52 (2006.01); C21C 7/06 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01)

CPC (source: EP US)

C22C 38/001 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE ES GB LI

DOCDB simple family (publication)

US 2002048529 A1 20020425; US 6572713 B2 20030603; AR 034003 A1 20040121; AU 1140902 A 20020429; AU 2002211409 B2 20040401; BR 0114601 A 20031014; CA 2410558 A1 20020425; CA 2410558 C 20080122; EP 1337679 A1 20030827; EP 1337679 A4 20040609; JP 2004511662 A 20040415; MX PA03003277 A 20030807; MY 127762 A 20061229; WO 0233139 A1 20020425; ZA 200209346 B 20030804

DOCDB simple family (application)

US 93215501 A 20010817; AR P010104872 A 20011017; AU 1140902 A 20011003; AU 2002211409 A 20011003; BR 0114601 A 20011003; CA 2410558 A 20011003; EP 01979440 A 20011003; JP 2002536107 A 20011003; MX PA03003277 A 20011003; MY PI20014451 A 20010924; US 0131018 W 20011003; ZA 200209346 A 20021118